沉积盆地中石油初次运移研究的进展

根据油气初次运移的研究历史和现状,本文指出沉积盆地中的石油初次运移是以分离的相态与水一起或单独排出生油岩的,其动力是高压异常等因素,只有生油岩孔隙中烃类饱和度超过临界值(10％～20％)时,初次运移才实现。本文介绍了初次运移现象的观察和研究方法,对生油潜力不同的生油岩排烃过程、通道和效率作了论述,引入了初次运移的两相流动概念和方法。

ABOUT STUDIES ON PRIMARY MIGRATION OF HYDROCARBONS IN SEDIMENTARY BASINS

This paper suggests that hydrocarbons generated in. both shales and carbonates were expelled as separate phases with water or alone.The primary migration was caused by the overpressure in the source rocks, and occurred only when a critical saturation of hydrocarbons in the pores of the soucc rocks was reached (e.g. 10% or 20%) , The observations and investigations on the phenomena of the expulsion from source rocks are reviewed in this paper, and the process, pathway and efficiency of the expulsion from different potential source rocks are discussed. The concept of tvo phase flow and a mathematical model of primary migration are established to the benefit of the estimation of hydrocarbon resources and the simulation of basin evolution.